Italics—slanted typography (like this)—play a crucial role in modern English typography, visual hierarchy, and grammar rules. Unlike bold text, which is primarily used to draw immediate attention, italics are used to signal subtle shifts in context, tone, title classification, or language origin.
Whether you are writing an academic paper, drafting a manuscript, or formatting a corporate report, knowing when to italicize words ensures your text remains clear, professional, and grammatically accurate.
This guide breaks down the 6 primary functions of italicized words, complete with practical sentence examples and formatting guidelines.
Note: This guide expands upon the writing standards discussed in theEnglish Forward Italicized Words Forum Thread.
The 6 Main Rules for Using Italics in Writing
1. Titles of Standalone & Major Works
In formal typography and academic style guides (such as APA, MLA, and Chicago), standalone, major works are italicized. Shorter works that exist as part of a larger collection (such as individual songs, short articles, or single chapters) are placed in quotation marks instead.
Italicize these major standalone works:
- Books: To Kill a Mockingbird, The Great Gatsby
- Movies & Films: Inception, The Godfather
- Newspapers & Periodicals: The Wall Street Journal, The Economist
- Albums: Abbey Road, Dark Side of the Moon
- Plays & Operas: Hamlet, The Phantom of the Opera
- TV Shows: Breaking Bad, Succession
- Example: I read an article about macroeconomics in The Wall Street Journal this morning.
2. Foreign Words & Phrases
When using a loanword or foreign term that has not been fully adopted into standard everyday English dictionaries, italicize the foreign word to signal its origin to the reader.
- Example: The restaurant offered a wonderful je ne sais quoi that kept customers coming back.
- Example: In legal agreements, bona fide intent must be proven by both parties.
Rule of Thumb: Common foreign words that have been fully absorbed into English—such as cafe, resume, cliché, status quo, or et cetera—do not need italics.
3. Names of Named Vehicles & Vessels
Specific, named craft—such as ships, aircraft, spacecraft, and trains—are written in italics.
- Ships & Boats: HMS Victory, RMS Titanic
- Spacecraft: Apollo 11, Voyager 1
- Trains: The Orient Express
Note: Do not italicize prefix abbreviations like USS or HMS (e.g., USS Enterprise).
4. Words Used as Words & Letters Used as Letters
When referring to a word as a linguistic entity itself—rather than using it for its meaning within a sentence—italicize the word or letter.
- Example: The word misspelled is frequently misspelled.
- Example: Be sure to dot your i‘s and cross your t‘s.
- Example: What is the difference between affect and effect?
5. Adding Subtle Vocal Emphasis
Italics can be used sparingly to mimic spoken stress or vocal cadence, shifting the reader’s interpretation of a sentence.
- Example: I didn’t say she stole the money. (Implies someone else said it)
- Example: I didn’t say she stole the money. (Implies she took it through other means)
- Example: This is the only solution available.
Formatting Tip: Use italics for emphasis sparingly. Overusing italicized words for emphasis in formal or business writing can make text feel informal or cluttered.
6. Scientific Names (Genus & Species)
In scientific and technical writing, binomial nomenclature (the Latin biological names of organisms) is always italicized, with the genus capitalized and the species in lowercase.
- Example: Homo sapiens
- Example: Escherichia coli (often abbreviated as E. coli)
Summary Reference Table
| Category | Italicize? | Example |
| Book / Movie Title | Yes | We watched Interstellar last night. |
| Short Article / Song | ❌ No (Use Quotes) | We listened to “Bohemian Rhapsody”. |
| Uncommon Foreign Terms | Yes | He explained the concept of schadenfreude. |
| Named Ships & Spacecraft | Yes | The museum features the USS Constitution. |
| Words Used as Words | Yes | How do you define integrity? |
Related Cluster Guides & Next Steps
Understanding proper typography and mechanics elevates your overall writing precision. Explore our related grammar guides:
- Phrasing & Modality: Learn whether “Do I have to” or “Have I to” is correct in Do I Have To vs Have I To Explained .
- Punctuation Rules: Find out when to hyphenate age expressions in ‘Years Old’ or ‘Years-Old’? Punctuation Rules .
- Subject-Verb Agreement: Learn when to use singular vs. plural verbs in ‘The Following Is’ or ‘The Following Are’? Grammar Rule .
- Master Guide: Return to our central portal on Everyday English Grammar Rules & Common Pitfalls .
Need Help Formatting Your Writing?
Have a complex title or foreign phrase you aren’t sure how to style? Ask the writing experts on the original English Forward Italicized Words Forum Threadto get quick guidance.
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